Elements: How can I unpin my organizer from the top of my Mac screen?

Somehow, probably with some kind of a swipe this way or that, I have accidentally pinned my Elements organizer to the top of my screen and I can't figure out how to unpin it. I can still use it, but it is much harder to access pics when you can only see one row at a time. I checked with one of the Mac Stores and they couldn't help me. I assume it is just a simple keystroke to maximize it. Any suggestions?